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CBSE Class 9 Answered

An object moves through 10m in 2minutes and the next 20km at a speed of 60km/h . Calculate its average speed ?
Asked by Babulalgupta1113 | 21 Jun, 2018, 11:34: AM
answered-by-expert Expert Answer
Time taken to travel 20 km with speed 60 km/hr = 20/60 = 1/3 hr = 20 min
 
Time taken to travel total distance = 2 + 20 = 22 min
 
Total distance = 20000+10 = 20010 m
 
average speed = Total distance / Total time = 20010 / (22×60) = 15.16 m/s
Answered by Thiyagarajan K | 21 Jun, 2018, 15:03: PM

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